It probably can be used for other non NES games on Switch as it will be added to a firmware update. So they might even work with any Switch games in theory... it's just certain advanced control options won't work if they don't have a button for them. They added L and R buttons on top of the NES pad so that tells me they were thinking of other games instead of just NES games which never needed L and R. The rumor is multiple classic controllers are being added in the new firmware. :)

talk about milking the cow. I will admit though. the fact that they're exclusive is kind of nice. I mean it's not like availability is going to be an issue because scalpers bought them all up. I don't like how it's set up to prevent this alone it's probably worth going the route Nintendo chose to. 30+ year old controllers w/ a Switch Rail and LiOn battery are $30 each though? Makes me reconsider and just keep hooking up the NES when the mood strikes.